建筑结构学报2017，Vol.38Issue(10)：1-9,9.DOI:10.14006/j.jzjgxb.2017.10.001
Q690高强钢焊接箱形轴压构件整体稳定研究及设计建议
Overall buckling behavior and design of Q690 high-strength steel welded box-columns subjected to axial compression
摘要
Abstract
The main objective was to investigate the overall buckling behavior of Q690 high-strength steel welded box columns and provide some recommendations for design of such columns.The residual stress distribution of three boxsection specimens made of Q690 high-strength steel was measured,and the simplified residual stress models related to such specimens were proposed.Moreover,five welded box columns with the Q690 steel grade were prepared.An experimental study on the overall buckling behavior of such pin-ended columns under axial compression was carried out.Before the experiment,the initial crookedness and loading eccentricity of the specimens were measured and recorded.The experiment shows that the failure modes of all specimens are overall buckling.Based on the experimental results,the overall buckling behavior of the axially loaded high-strength steel columns were discussed.With the direct analysis method,the numerical model was established and verified.Subsequently,parametric study of box columns is conducted by applying the numerical model.Based on the results of the experiment and parametric study,some proposals for design of Q690 steel welded box columns are given.关键词
焊接箱形柱/Q690高强钢/残余应力/静力试验/整体稳定设计Key words
welded box column/Q690 high-strength steel/residual stress/static experiment/overall buckling design分类
建筑与水利引用本文复制引用
李国强,李天际,王彦博..Q690高强钢焊接箱形轴压构件整体稳定研究及设计建议[J].建筑结构学报,2017,38(10):1-9,9.基金项目
国家自然科学基金项目(51378378),“十三五”国家重点研发计划(2016YFC0701200). （51378378）
